物种多样性和林分结构对青冈林乔木层生物量的影响  

Effect of Species Diversity and Stand Structure on the Biomass of Arbor Layer in Forest Dominated by Quercus glauca

作　　者：张勇 陆尤尤 王志高 吴初平[3] 姚良锦 焦洁洁[3] 李兰英[4] 王增 ZHANG Yong;LU Youyou;WANG Zhigao;WU Chuping;YAO Liangjin;JIAO Jiejie;LI Lanying;WANG Zeng(Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province,Zhejiang A&F University,Hangzhou 311300,China;Zhejiang Ecological Forest and State Forest Farm Administration,Hangzhou 310020,China;Zhejiang Academy Forestry Science,Hangzhou 310023,China;College of Economics and Management,Zhejiang A&F University,Hangzhou 311300,China)

机构地区：[1]浙江农林大学浙江省土壤污染生物修复重点实验室,浙江杭州311300 [2]浙江省公益林和国有林场管理总站,浙江杭州310020 [3]浙江省林业科学研究院,浙江杭州310023 [4]浙江农林大学经济管理学院,浙江杭州311300

出　　处：《浙江林业科技》2024年第6期16-20,共5页Journal of Zhejiang Forestry Science and Technology

基　　金：浙江省土壤污染生物修复重点实验室开放基金(FSLAB2021006);浙江省“尖兵”“领雁”研发攻关计划资助(2022C02053)。

摘　　要：为探究物种多样性和林分结构对青冈Quercus glauca林乔木层生物量的影响,本文以2020年在浙江省9个设区市设置的138个青冈林样地为研究对象,以物种多样性、胸径、树高三个因子作为潜变量,并采用结构方程模型方法,分析了物种多样性、胸径结构和树高结构对青冈林乔木层生物量的影响。结果表明,林木胸径、树高和物种多样性对青冈林乔木层生物量具有直接和间接效应,其直接效应分别为0.17、0.35和−0.42,而通过其他因子产生的间接效应使得总效应分别提高了64.71%、20.00%和40.50%;物种多样性的负效应与青冈林中青冈的主导优势地位有关;异龄复层林经营模式有利于充分利用林内营养空间,促进青冈林生物量的积累。During July and September 2020,138 sample plots with 20 m×20 m were established in the forest dominated by Quercus glauca in 9 cities of Zhejiang province,and woody plant with DBH≥5 cm in the plots were recorded.The effect of species diversity,DBH and tree height on biomass of arbor layer was analyzed by structural equation model.The result showed that DBH,tree height and species diversity had direct and indirect effects on the biomass of the canopy layer.The direct effects are 0.17,0.35,and−0.42,respectively,while the indirect effects through other factors increase the total effects by 64.71%,20.00%,and 40.50%,respectively.The negative effect of species diversity was related to the dominant position of Qu.glauca.Uneven aged and multi-storied stand forestry management model is beneficial for fully utilizing the nutrient space within the forest and promoting the accumulation of biomass in Qu.glauca forests.

关 键 词：青冈 生物量 物种多样性 胸径 树高 

分 类 号：S792.189[农业科学—林木遗传育种]